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Power Supply, Primary Switch Mode, Narrow Design – MINI-PS-100-240AC/5DC/3
7.2. Temperature Response
At an ambient temperature of up to +60°C (+140 ? F)
the device can supply an nominal current of 3 A.
POWER BOOST is available for a few minutes. The
output power must be decreased by 5% per Kelvin
temperature increase for ambient temperatures over
+60°C (+140 ? F).
At ambient temperatures over +70°C (+158 ? F) or in
the event of a thermal overload, the device switches off
6
3
U OUT = 5 V
POWER
BOOST
to protect itself. The device switches on again once it
has cooled down.
0
0
20
40
60
7.3. Parallel Operation
Devices of the same type can be connected in
parallel to increase both redundancy and power. The
default setting does not have to be adjusted.
If the output voltage is adjusted, an even current
distribution can be ensured by precisely setting all
power supplies that are operated in parallel to the
same output voltage.
To ensure symmetrical current distribution we
recommend that all cable connections from the power
supply to the DIN rail are the same length and have the
same cross section.
Depending on the system, for parallel connection of
more than two power supplies a protective circuit
should be installed at each individual device output
(e.g., decoupling diode or DC fuse). This means that in
the event of a secondary device fault high return
currents are avoided.
7.4. Redundancy Operation
Redundant connections are designed for supplying
systems, which place particularly high requirements on
operational safety. If a fault occurs in the primary circuit
of device no. 1, device no. 2 automatically takes over
Ambient temperature [°C]
Figure 11
the complete power supply without interruption and
vice versa.
For this purpose, the power supplies to be connected
in parallel must be large enough that the total current
requirements of all loads can be completely covered by
one power supply. External decoupling diodes or are
required for 100% redundancy.
MINI
5 V/3 A + –
+
–
MINI
5 V/3 A + –
7.5. Power Increase
The output current can be increased to n x I N where
n is the number of devices connected in parallel.
The parallel connection for power increase can be
used to extend existing systems. A parallel connection
is recommended if the power supply does not cover the
Σ = 3A
+ –
Figure 12
current consumption of the most powerful load.
Otherwise, the loads should be divided over
independent individual devices.
A maximum of ? ve devices can be connected in
parallel.
MINI
5 V/3 A + –
+
–
Σ = 6A
MINI
5 V/3 A + –
+ –
Figure 13
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